[]int{1, 1, 2},
		[]int{1, 2},
	},
	{
		"unsorted",
		[]int{1, 2, 1},
		[]int{1, 2, 1},
	},
	{
		"many",
		[]int{1, 2, 2, 3, 3, 4},
		[]int{1, 2, 3, 4},
	},
}

func TestCompact(t *testing.T) {
	for _, test := range compactTests {
		copy := Clone(test.s)
		if got := Compact(copy); !Equal(got, test.want) {
			t.Errorf("Compact(%v) = %v, want %v", test.s, got, test.want)
		}
	}
}